It's happened a few times to me that I met a professor or researcher at an informal event, we had a good conversation, and they offered "help," as in "if you need any help, just shoot me an e-mail" or "let's keep in touch, in case you need help in the future." I have no idea what "help" is, or how I am meant to follow up on such an offer. Is it a sort of platitude that I am not meant to take literally?
These are usually not researchers or professors at my university, but they are usually in my field. I'm an undergraduate, currently in my final year and applying to grad school, but obviously this hasn't been the case for the past few years (and this is a recurrent situation).